Mechanism for removing welding burrs



July 25,v 1-944. c. R. BABEv Y MECHANISM FOR REMOVING WELDING BURRS Filed June 6, 1940 2 Sheets-Sheetl FEM lll i All. l

;` INVENTOR.

CLAUDE R. BA B B.

ATTORNEY.

July 25, 1944. c. R. BABB MEcHANrsM FoR REMovING WELDING BuRRs Filed June e, 1940 2 sheets-sheet 2 B. B A amy R.. E mRm E o mon Vu A muy C17 Y.A B

. nal Wall of the body.

` it permits 'ci the removal A1 me@ my 25 1944 .UNITED STAT-Es PATENT ol-FICE g Y a m289- .2,354,289 Mllcnmslir Fon nmovrNG WEI-.pme anims u Claude B. Babb, Lakewood, Ohio, assignor to The Yoder Company, Cleveland, Ohio, a corporation of Ohio Application `.miie 6,1940, serial No. 339,045

(ciau-a3) L 6 Clailfns.

This inveniien relates te apparatus for meking hollow-bodies'having a welded seam, more particularly means for removing or shearing off the' welding burr on the internal 'surface of the bodies. The internal burr removing means are preferably combined with mechanism for continuously forming sheet metal into hollow form, with the side edges of .the sheet metal brought into close side by side relation, welding the side edges, and removing the external burr from the.

Another object .ofl the invention is tn provide an improved device for shearing of! the welding burr on the internal wall of a hollow body, the device being supported bythe internal wall thereofand havinga cutting edge disposed at a substantially inclined angle to the burr and arranged to shear it olf due to relative movement between the body and device.

position the shearing device into. each section and its removal therefrom are eliminated.

Fig. l is a side elevation of an apparatus for continuously forming sheet metal as .itcomes from the mill into cylindrical form, the welding means for the form being shown semi-diagrammatically, and an internal burr removing means embodying my invention.

- Fig. 2 is a fragmentary section 'on the line 2 2 'er Fig. 1.

. Fig. 3 isl a fragmentary 'View similar /to FigQZ,

' members;

Fig. 4 is'a fragmentar'ylongitudinal section of. -the hollow body or cylinder showing the cutting device in position therewithln and the pressure Fig. 5 is a fragmentary section on the line 5-5' Fig. s ls a view similar to Fig. 5, but applied to ahollow body that is non-circular in cross ings or standards 2, 3. I, i andi, each pair sup- A further object of the invention is to providev an improved unitary tool adapted to fit within a hollow` body and having a curvilinear cuttingA edge extending at an. angle to the burr to shear it off as the body moves longitudinally.

Other objects of the invention will ent to 'those skilled in the art to which' my invention relates from the following description taken Vin connection with the"'accompan ying drawings.

My internal burr shearing means are combined or associated with a mechanism for continuously forming a hollow body, preferably cylindrical in .cross section, since such mechanism permits the burr cutter .or shearer to. be readily mounted within the body, the feed of the material to and through the forming passes provides for the .relative movement between the hollow body and the cutter or. shearer longitudinally of the burr and of the burr before the final sizing, straightening and cutting o'f the holllow body into predetermined lengths or sections,

and the time, labor and equipment required to appar? Fig."1 is a view similar to Fig. 4, but showing a Amodified form of cutting device.

Fig. 8 is a section on the line 8 -8 of Fig. 7.

Fig: 9 is a view similar to Figs. 4 vand 7, but showing another modified form of cutting device.

Fig. 10 is a section on the line lli-'440 of Fig. 9, enlarged.

In the drawings, I .indicates as an entirety a bed or base on which are mounted pairs of housporting a set of forming rolls 2a through which sheet metal A is fed. 'The formingrolls 2a of each set are driven in any suitable manner so as to feed the sheet metal A endwise.- The sets of -rolls progressively a hollow form A'. with its opposite side edges in valined, contact relation. 'I'he form A' thenmoves to and through a suitable welding meansindicated as an entirety at 1.' The welding means may be of any standard'or conventional construction, but for illustrative' purposes I .have shown two electrodes 1a, 1a, and a pair of squeeze rolls 8 engaging the opposite-sides ofthe formed body. A' belowl the electrodes'j the elec .trodes 1a, 1a, being vadapted to be-electrically connected to the terminals of the secondary windings ofa suitable transformer to which cu'rrent is supplied, whereby the electrical resistance setup between the contacting vside edges of `the body A.' welds them, as shown at 9, the fused metal fforming an external burr i0 and an ln'- ternal burr Il. The formed pipe A then feeds past a suitable cutter. i2, mounted on a. bridge,

l for shearing oif the external burr l0 as the body form'the sheet metal A into A' moves endwise.- The bridge i3 is supported on a pair of housings I 4 provided with bearings for the shaft of a roll i5, which is arranged to support the formed body A' directly below the cutter I2.

. A I6 indicates as an entirety means for removing or shearing of the internal burr II. The burr removing means It consist of a cutting tool or device I1 mounted within the body A' and a nxture I8 connected to the device I1, for holding it stationary, since the body A' is fed endwise as already set forth, and thus moves relative to the device. The fixture Il consists of an inverted substantially U-shaped casting I! fitting over the moving stock or sheet metal A andV suitably se- A`cured to the base i between the housings and 6 and a depending arm ila, this arrangement permitting the shearing device to be anchored to a support positioned in advance of the ilnal formation of the sheet metalA into hollow form. 'I'he arm isa is formed with a through opening in substantially axial relation to the axis of the body A' to receive the reduced outer end portion of a rod 2l, such end portion being threaded to take nuts 2|, 2|a,which are tightened against the cutting deviee I1. The cutting' device n may i be locked to the rod 2l by a, jam nut 22a. Byv

loosening/thenut 22a, the device I1 may be adjusted axially of the rod and also angularly thereof, although when it is desired to adjust the detion, that is, in the path ofy movement of the burr .internal burr I l.

li, so that'the tool may be used for a long period of time without requiring sharpening or replacement. When the shearing tool I1 consists of a twist drill or is otherwise shaped in cross section to engage thesidewalls of the body A', it may be used for hollow bodies A? of polygonal shape in cross section, one example of which is shown in Fig. 6.

.'rne sneered eff internai tunis guided te thev lower portion of the form and conveyed away with other foreign matter (welding spatterings` a and scale) by the nioving form. However, by'

substituting a pipe V20a (see Figs. 9 and 10) for l the rod 20, having at its inner end a. connection with a liquid ushing material (such as water) supplied under pressure and providing one or more openings 24 in the shank of the tool in connected relation to the inner end of the pipe 20a, the foreign matter may be flushed out simulta'ieously with the operation of removing the Figs. 7 and 8 illustrate another modiiication. In these views, 25 indicates the tool having a cutting edge 25a extending spirally relative to the vice Il angularly I prefer to -rotate the rod 2L as already set forth, as such adjustment does not require the removal of the device. The cutting device I1 comprises an elongated body having on its upper side a, cutting edge Ila which extends spirally relative to the axis thereof and is disposed in -the path of movement o! the burr axis of the tool. As shown, that portion of the edge 25a between and in line with the pressure rolls 2C serves to shear of! the internal burrA Il, and' portions' of the edge 25a' in advance and rearward of the shear oif position engage with the opposite side of the formA' so as to support the tool on opposite sides of that portion of the edge which shears off the burr. A twist drill may be advantageously used.v 3S shown; however,v where a twist drill is employed the other ute 2i and its cutting edge is ground on to prevent contact thereof with the burr il the form A'.

To those'skilled in the art to which my invention relates many changes in construction and widely diirering embodiments of the invention Il andservestoshearoil'thelatterasthehodyA A' feeds endwise. The cutting device llhas a diameter which approximates the internal diameter of the body A', whereby the walls of the laty ter support the device substantially centrally of the body and permits the movement thereof relative to the cuttingy device. By preference, the cutting device I1 consists of a twist drill of conventional construction, an intermediate upper l portion of one lateral cutting edge -thereof being utilizedtoshear offtheburr II. Duetothefact that the cutting device vis slightly smaller in diameter than the internal diameter of the body A' I providea pair of pressure rolls 2l which engage the top and bottom portions of the body A' will be apparent without departing from the spirit and scope thereof. My disclosures and the description herein are purely illustrative and not intended te be in any sense limiting.

What I claim is: l

1. InV a machine for shearing oit the welding burr on the er wall of a hollow member, the combination with a support and means for moving the neuew member endwise. ef aeutting de'. vice comm-Ising an elongated body xedly con- Anected at its inner end to said support and having spaced side portions slidably ilttingthe inner walls of the' hollow member and forming between them channels open at the outer end of said elongated body, aportion of one of said side in line with the shearing olf-point of the cutting edge Ila and serve to commess the upper wall of the body A' suiiiciently so that such edge shears i ,Y

the burr oi! even1y ;or flush with the inner surface of the .body (see liig. 5). When a twist drill is employed, the cutting edge thereof opposite the point of shear is rounded oil. as shown at IIb in Fis. 5 andthe outer'suriaces of the flutes in advance of the edge employed to shear on' the -portions terminatingin a inthepath of movement cutting 'edge disposed in substantially ineiined relation te the burr and thereof and arranged to shearoil'vthe burr along a transversely inclined line'due to longitudinal movement of the hollow member relative to said device.

V2. A machine as claimed in claim` l, wherein are provided pressure applying means diametriburr are ground oir to prevent with' the burrI Il. The pressure rolls 23 are suitably mountedinhousingsaandmaybedrivenif cally engaging the member opposite to the point of shear-by said cutting edge.

3.Inalachineoftheclassdescribed,the

combination with a support and means thereon and walls of assenso vice nxedly mounted within the member and having longitudinally extending spaced side por- A tions supported on and slidably fitting theinner wall of the hollow member, one of said side portions terminatig in a cutting edge extending g .spirally relative to the axis of said device and 4. In a machine of the class described,4the I combination with a support and means lthereon for feeding endwise a hollow member having on its inner wall a welding burr, of a shearing device xedly mounted within the member and having longitudinally extending spaced side' portions supported on and slidably iittingthe inner wall of the hollow member. one of said side portions terminating in a cutting edge extending spirally relative to the axis of said device and disposed in the path of movement of the burr tor shearing it oil', means for adjusting said device angularly, and pressureapplying'means dia'metrically engaging the member opposite to the point of shear by said cutting edge, said pressure applying means being adjustable longitudinally of said hollow member.

5. In apparatus of the class described, the combination with a support and means thereon for moving a hollow member endwise. a tubular into said hollow member, and a tool connected to the inner end of said tubular member and com- 'prising a spirally shaped wall, portions of which have sliding engagement with the wall oi' said 'hollow member and another portion ot which terminates in a spiral cutting edge arranged to remove the burr on the hollow member as the lattermoves endwise, the inner end portion of said tool being formed with a port to connect the openingA in said tubular member with the space at one side of said spiral wall.

6. In a machine of the class described, the combination with a support and means thereon for -moving endwise a hollow member having on its inner wall a longitudinally extending welding burr, of a cutting device comprising an elongated body engaging the inner walls of said moving member and connected at its inner end to said support to prevent movementof said device with 20 said member. a portion-.f said device being formed with a spiral" groove forming a channel open at its outer end and a portion of the outer 'wall of said groove having a cutting edge disposed in lsubstantially,inclined relation to the 25 burr and in the path of movement thereofA and arranged to shear oil.' th

burr along a transversely inclined line due to the longitudinal movement of the hollow member relative to said' device, and pressure applying means diametrically enlaging the memberopposite to the point oi shear by said cutting edge.

- CLAUDE R. BABB. 

